Sports fans will soon be logging more than player statistics during a game. Under Armour and Zephyr Technology have teamed up to create sensor-equipped compression shirt that measures an athlete’s performance, including heart rate, metabolism, body position, and lung capacity. But the data doesn’t just allow coaches and trainers to customize workouts without risking strain or injury; it can also be broadcast on a stadium display to engage spectators on a whole new level. Could instant recall of a player’s breathing rate or acceleration become the new bragging right?